a very cold election day here in boston. we were just kicked out of the convention center. as you might be able to see behind me, an overnight security sweep is just starting inside. >> i need your vote. i need your help. walk with me. walk together. tomorrow we begin a new tomorrow. >> reporter: mitt romney finished about an hour ago in new hampshire what was to be his final campaign event. after hunting for votes in three other swing states today. but late today he added two rare election day appearances. back again to pennsylvania and ohio. ♪ [ music ] >> we're going to finish strong and bring home a victory. >> reporter: elaine got her phd at cal and has worked in democratic administrations, now teaches at harvard, where romney got his mba and law degree. she says the race is a toss up. >> i do think it's tight. i think the media is being overly cautious, because i think it's an impossible race to call. >> reporter: not impossible to call here in heavily democrat massachusetts, where romney was governor, and where he'll vote in just a few hours. polls show he will not